Questions about the generation and use of compiled functions using Compile.

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0answers
34 views

Undeclared Identifier error in Compile

I've been trying to compile a couple of functions in Mathematica, and I keep coming across an error that I do not know how to resolve. Consider the following function: ...
8
votes
2answers
177 views

CompiledFunction crashes kernel

Bug fixed in 10.0.0 This crashes my kernel ...
2
votes
1answer
42 views

Using Compiled Function in Implicit Region

I am looking for a way to speed up code and thus would like to use a compiled function in an ImplicitRegion. Here is an example of a region that can be plotted ...
4
votes
0answers
116 views

CompilationTarget to C takes long compilation time

Consider I have a function, with one version that compiled to the virtual machine and one that compiled to C: ...
7
votes
1answer
83 views

How to compile procedural program effectively

Consider these four function in different form: ...
1
vote
1answer
129 views

How to speed up an optimization with very long symbolic expressions?

I have 8 very long symbolic expressions (each having around 200,000 summands) - Simplify will run forever, so that is unfortunately not an option. Each of those ...
3
votes
1answer
50 views

Use a part specification as the argument to a compiled function

I have some code that needs to generate a large matrix based on some complicated combinations of smaller matrix elements. I find that if I write a function for the element of the larger matrix, and ...
1
vote
0answers
112 views

How to use Wolfram language in an external program with low latency?

Im using Wolfram language on Pi B,and I want to compile a '.m' file (like "test.m" that contains Wolfram functions), in an external program like a C/C++ and then Export the output in an image file ...
7
votes
2answers
194 views

Catching error in middle of evaluation of compiled function

I have programmed and Compileed a complicated numerical function. The function has singularities (i.e. are infinite) at certain input numerical values. I need to ...
2
votes
1answer
72 views

CCompile Problems

Operating System: Windows 8.1 Mathematica: 8 In possession of: Visual Studio 2013 and 2015 Had to alter the visual studios driver file within CCompilerDriver application, add-on so that it found the ...
0
votes
0answers
48 views

Compilable function with the functionality of SingularValueList

I'm doing something that involves finding the singular values of a lot of matrices. Basically I need to find singular values of $n$ matrices of dimension $n\times n$, where $n$ is as large as ...
3
votes
0answers
71 views

Why Function is compiled?

Function isn't mentioned in the list of compilable function, but it can generally be compiled when it's formed by compilable functions, a simple example is: ...
12
votes
1answer
471 views

What function generates random numbers in a compiled function?

I am writing a simulation for 2D random walk. I wrote several version of code, and found that the speed is like this (fastest to slowest): C++, Mathematica compiled procedural code, Mathematica ...
1
vote
1answer
61 views

What is the meaning of the lists of numbers in the FullForm of a compiled function?

For example, f = Compile[{{x, _Real}}, x]; FullForm[f] has this output: ...
12
votes
1answer
446 views
5
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0answers
81 views

Compiling FoldList implementation for RK4

Original I'm looking to write an integrator for a function of two variables. Here is my implementation for the RK4 update rule using FoldList. ...
7
votes
0answers
147 views

What is a good way to code long, complex, compilable algorithms?

The functional paradigm of the Wolfram Language used in Mathematica is all around wonderful. For intense numerics, Mathematica comes with the ability to Compile ...
3
votes
0answers
77 views

speed up evaluating a listable function

I apologize in advance for the vagueness, but I can't think of a more descriptive title. I am trying to find the average value of the square of BesselJ[0, x] ...
13
votes
1answer
415 views

Why is MainEvaluate being used when LinearSolve can be compiled?

According to this question LinearSolve can be compiled. However, CompilePrint[] shows a call to ...
11
votes
1answer
703 views

Example program for calling Mathematica from C

I want to call Mathematica from a C program. Suppose I have two numbers x = 2 and y = 3. I want to define ...
33
votes
4answers
1k views

Compiling more functions that don't call MainEvaluate

I would like to use Compile with functions defined outside Compile. For example if I have the two basic functions ...
6
votes
0answers
111 views

Fine tuning compiled code that computes dilogarithm function

As an exercise of writing a good Compile function, I want to do the simple task of coding a routine that outputs the real part of the dilogarithm function ...
1
vote
2answers
64 views

How to build recursive function which only remembers every pth value and the last two values?

I need to create a recursive function of the natural numbers $f$ which only remembers the last two values it has found and every $p$th value. Below is the form of the code that I am working with, but ...
4
votes
2answers
257 views

How to compile this function

I want to compile my function that calculates the energy of a particle system. This is what I've tried: ...
5
votes
3answers
89 views

Problem with Compile and Flatten

I want to get two lists within a compiled function, where r is an integer: ...
21
votes
1answer
304 views

Performance regression for Fold?

Bug introduced in 8.0 and persisting through 10.1.0 or later I noticed an over 10x performance drop on Mathematica v9.0.1 (as Oleksandr R. commented, also v8) compared with v7.01 for this code: ...
8
votes
3answers
572 views

What is wrong with my expression for compiling?

Following code was translated from a snippet matlab code. Without compiling it worked slowly. I want to compile it, but am getting a numerical error. How do I compile this in a correct way? ...
24
votes
3answers
848 views

Which Distributions can be Compiled using RandomVariate

Recently, Oleksandr kindly showed a list of Mathematica commands that can be compiled. RandomVariate was part of that list. However, whether this can be compiled depends upon the distribution that is ...
4
votes
2answers
159 views

Improve simulation speed using Compile

I have two square matrices, a hermitian matrix h and an unitary matrix v. I am interested in the following function ...
15
votes
0answers
221 views

Compile not correctly initializing a variable defined inside Module

Bug introduced in 8.0 and persisting through 10.1.0 or later In the following example, inside the minimumX's Module, ...
6
votes
1answer
253 views

Compiling a function that takes lots of optional arguments

I have a function that takes lots of optional arguments (basically some design parameters, about 10 of them) and performs some basic algebraic calculations involving complex numbers with the options. ...
2
votes
0answers
56 views

Compilation of a function that needs to call Subsets

I'm working on a code that runs many (easy) operations on combinations (subsets) of different size (6, 7, 8, 9) taken from a big set of numbers (normally more that 40). So, this means the code has to ...
0
votes
1answer
86 views

How to compile a function whose arguments are lists containing strings?

I'm unsuccessfully trying to compile this function check[argA_, argB_] := argA[[1]] == argB[[1]]; assuming that both arguments argA and argB are of the form ...
12
votes
1answer
164 views

CompiledFunctionCall vs. LibraryFunction

When compiling code to C, and the compiled code calls other compiled functions, I see CompiledFunctionCall in the output of ...
7
votes
1answer
284 views

Exporting a compiled function for later use

I wish to export compiled functions for later use. This means that I do not want the compiled function to be recompiled every time I reload it. It also means that if my compiled function was for ...
5
votes
1answer
100 views

Compilation of `Total` with CompensatedSummation

I sometimes obtain an unexpected error when trying to call a compiled version of Total with compensated summation turned on. More specifically I define ...
11
votes
2answers
267 views

Can RecurrenceTable make use of CompiledFunction?

I'm trying to implement a discrete-time 2D Verlet algorithm for a point-mass subject to a softened gravitational interaction as a test for a more computationally intensive simulation using ...
2
votes
3answers
105 views

NIntegrate-ing a compiled function

I'm trying to integrate numerically in 6 dimensions a very long expression and I read about the option to NIntegrate a compiled function which should be faster. ...
7
votes
1answer
143 views

Compiled function crashes kernel when trying to list over different length arguments

I'm trying to speed up a tally/binning operation that I have to run many times. I have many lists of between 1 and 10 numbers from the range [1,5] and I want to ...
5
votes
2answers
116 views

A problem with Compile and Map

There is a weird behavior of Compile that I do not understand. Consider the following example: ...
2
votes
1answer
64 views
6
votes
5answers
474 views

How to compile the code for generate Pythagorean_triple?

I am finding Pythagorean_triple, it worked slowly. I tried to compile, but it gives some warnings. I also use "Case" or "Do" ,both of them failed.I'm sure my CCompiler has been set correctly. How can ...
5
votes
1answer
207 views

Is there any strategy to have a compiled version of FindFit or NonlinearModelFit?

Disclaimer: This is not a precise question with a definite answer. I know that neither FindFit nor NonlinearModelFit is in the ...
3
votes
2answers
150 views

Dynamic arrays and lists with compile (Append, Linked lists etc.)

I have a code that I need to compile. The code contains a loop in which I need to gather data into a list. The question is how to best gather data so that the code works inside Compile. The following ...
0
votes
0answers
69 views
14
votes
2answers
177 views

CompiledFunction returns machine numbers smaller than $MinMachineNumber

When thinking on the workaround for this LogLogPlot bug suggested by halirutan I noticed that CompiledFunction actually can ...
0
votes
1answer
65 views

Why does Compile redo the calculation when overflow happens?

When implementing the Numerov method solving Schrodinger equation, I encountered this problem. In order to show the order of the evaluation, Print is added. ...
5
votes
1answer
197 views

Compile, “global variables” and recursion

I am trying to do something similar to this, namely to make a Compile'd function outer that itself calls a ...
0
votes
2answers
116 views

Numerical 3D Integration in Mathematica [closed]

My question in short is: Is it possible to make numerical 3D integration in mathematica efficiently? Or am I gonna have to move this to C++? I feel this problem is way too trivial to go to C++, so ...